Articulation markings in general:
Articulations on the bass flute:



legato

Legato

Legato is played without tonguing.
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register

nonlegato

Non Legato

Each individual note is tongued and separated.
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register

staccato

Staccato

Short and separated notes (all tongued). Staccato need not mean aggressively short!
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register

wedge

Staccatissimo

Very short tongued notes. Sometimes notated as staccato notes with the word staccatissimo (or staccatiss.) written above.
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register



legato staccato

Combinations

Notes with both dots and slurs, or lines and slurs, vary in interpretation, but are somewhere between legato and non legato.
Tongued slurring:
Interpretation depending on context:
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register

tenuto

"Tenuto"

Tenuto (so-called) is really a variation on non legato and is sometimes seen with both lines and dots implying shorter note durations.
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register

double and triple tonguing

Double & Triple Tonguing

Partial tonguing in groups of two or three (e.g. on syllables ta-ka, or ta-ka-ka) to give a very rapid articulation.
Double tonguing:
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register
Triple tonguing:
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register

fluttertonguing

Fluttertonguing

A rolled 'r' tonguing. Not all players can do fluttertonguing. Those that cannot have to 'fake' with a throat flutter that sounds less effective.
About fluttertonguing notation:
Dynamics when fluttertonguing:
Flute
Low register
Middle register
High register
Piccolo
Low register
Middle register
High register